---
url: "https://pay.weixin.qq.com/doc/v3/merchant/4014399293-go.md"
title: "发起转账并完成免确认收款授权-请求示例-go"
doc_id: 4014399293
example_lang: "go"
---

## Go


需配合微信支付工具库 wxpay\_utility 使用，请参考 [Go](https://pay.weixin.qq.com/doc/v3/merchant/4015119334.md)

```
package main

import (
	"bytes"
	"demo/wxpay_utility" // 引用微信支付工具库，参考 https://pay.weixin.qq.com/doc/v3/merchant/4015119334
	"encoding/json"
	"fmt"
	"net/http"
	"net/url"
	"time"
)

func main() {
	// TODO: 请准备商户开发必要参数，参考：https://pay.weixin.qq.com/doc/v3/merchant/4013070756
	config, err := wxpay_utility.CreateMchConfig(
		"19xxxxxxxx",                 // 商户号，是由微信支付系统生成并分配给每个商户的唯一标识符，商户号获取方式参考 https://pay.weixin.qq.com/doc/v3/merchant/4013070756
		"1DDE55AD98Exxxxxxxxxx",      // 商户API证书序列号，如何获取请参考 https://pay.weixin.qq.com/doc/v3/merchant/4013053053
		"/path/to/apiclient_key.pem", // 商户API证书私钥文件路径，本地文件路径
		"PUB_KEY_ID_xxxxxxxxxxxxx",   // 微信支付公钥ID，如何获取请参考 https://pay.weixin.qq.com/doc/v3/merchant/4013038816
		"/path/to/wxp_pub.pem",       // 微信支付公钥文件路径，本地文件路径
	)
	if err != nil {
		fmt.Println(err)
		return
	}

	request := &TransferToUserRequest{
		Appid:              wxpay_utility.String("wxf636efh567hg4356"),
		OutBillNo:          wxpay_utility.String("plfk2020042013"),
		TransferSceneId:    wxpay_utility.String("1000"),
		Openid:             wxpay_utility.String("o-MYE42l80oelYMDE34nYD456Xoy"),
		UserName:           wxpay_utility.String("757b340b45ebef5467rter35gf464344v3542sdf4t6re4tb4f54ty45t4yyry45"), /*请传入wxpay_utility.EncryptOAEPWithPublicKey 加密结果*/
		TransferAmount:     wxpay_utility.Int64(400000),
		TransferRemark:     wxpay_utility.String("新会员开通有礼"),
		NotifyUrl:          wxpay_utility.String("https://www.weixin.qq.com/wxpay/pay.php"),
		UserRecvPerception: wxpay_utility.String("现金奖励"),
		TransferSceneReportInfos: []TransferSceneReportInfo{TransferSceneReportInfo{
			InfoType:    wxpay_utility.String("活动名称"),
			InfoContent: wxpay_utility.String("新会员有礼"),
		}},
		AuthorizationInfo: &UserConfirmAuthorizationInfo{
			UserDisplayName:        wxpay_utility.String("wx_123456"),
			OutAuthorizationNo:     wxpay_utility.String("plfk2020042013"),
			AuthorizationNotifyUrl: wxpay_utility.String("https://www.weixin.qq.com/wxpay/pay.php"),
		},
		SponsorMchid: wxpay_utility.String("1900001109"),
	}

	response, err := PreTransferWithAuthorization(config, request)
	if err != nil {
		fmt.Printf("请求失败: %+v\n", err)
		// TODO: 请求失败，根据状态码执行不同的处理
		return
	}

	// TODO: 请求成功，继续业务逻辑
	fmt.Printf("请求成功: %+v\n", response)
}

func PreTransferWithAuthorization(config *wxpay_utility.MchConfig, request *TransferToUserRequest) (response *TransferToUserResponse, err error) {
	const (
		host   = "https://api.mch.weixin.qq.com"
		method = "POST"
		path   = "/v3/fund-app/mch-transfer/transfer-bills/pre-transfer-with-authorization"
	)

	reqUrl, err := url.Parse(fmt.Sprintf("%s%s", host, path))
	if err != nil {
		return nil, err
	}
	reqBody, err := json.Marshal(request)
	if err != nil {
		return nil, err
	}
	httpRequest, err := http.NewRequest(method, reqUrl.String(), bytes.NewReader(reqBody))
	if err != nil {
		return nil, err
	}
	httpRequest.Header.Set("Accept", "application/json")
	httpRequest.Header.Set("Wechatpay-Serial", config.WechatPayPublicKeyId())
	httpRequest.Header.Set("Content-Type", "application/json")
	authorization, err := wxpay_utility.BuildAuthorization(config.MchId(), config.CertificateSerialNo(), config.PrivateKey(), method, reqUrl.RequestURI(), reqBody)
	if err != nil {
		return nil, err
	}
	httpRequest.Header.Set("Authorization", authorization)

	client := &http.Client{}
	httpResponse, err := client.Do(httpRequest)
	if err != nil {
		return nil, err
	}
	respBody, err := wxpay_utility.ExtractResponseBody(httpResponse)
	if err != nil {
		return nil, err
	}
	if httpResponse.StatusCode >= 200 && httpResponse.StatusCode < 300 {
		// 2XX 成功，验证应答签名
		err = wxpay_utility.ValidateResponse(
			config.WechatPayPublicKeyId(),
			config.WechatPayPublicKey(),
			&httpResponse.Header,
			respBody,
		)
		if err != nil {
			return nil, err
		}
		response := &TransferToUserResponse{}
		if err := json.Unmarshal(respBody, response); err != nil {
			return nil, err
		}

		return response, nil
	} else {
		return nil, wxpay_utility.NewApiException(
			httpResponse.StatusCode,
			httpResponse.Header,
			respBody,
		)
	}
}

type TransferToUserRequest struct {
	Appid                    *string                       `json:"appid,omitempty"`
	OutBillNo                *string                       `json:"out_bill_no,omitempty"`
	TransferSceneId          *string                       `json:"transfer_scene_id,omitempty"`
	Openid                   *string                       `json:"openid,omitempty"`
	UserName                 *string                       `json:"user_name,omitempty"`
	TransferAmount           *int64                        `json:"transfer_amount,omitempty"`
	TransferRemark           *string                       `json:"transfer_remark,omitempty"`
	NotifyUrl                *string                       `json:"notify_url,omitempty"`
	UserRecvPerception       *string                       `json:"user_recv_perception,omitempty"`
	TransferSceneReportInfos []TransferSceneReportInfo     `json:"transfer_scene_report_infos,omitempty"`
	AuthorizationInfo        *UserConfirmAuthorizationInfo `json:"authorization_info,omitempty"`
	SponsorMchid             *string                       `json:"sponsor_mchid,omitempty"`
}

type TransferToUserResponse struct {
	OutBillNo          *string             `json:"out_bill_no,omitempty"`
	TransferBillNo     *string             `json:"transfer_bill_no,omitempty"`
	CreateTime         *time.Time          `json:"create_time,omitempty"`
	State              *TransferBillStatus `json:"state,omitempty"`
	PackageInfo        *string             `json:"package_info,omitempty"`
	UserDisplayName    *string             `json:"user_display_name,omitempty"`
	OutAuthorizationNo *string             `json:"out_authorization_no,omitempty"`
}

type TransferSceneReportInfo struct {
	InfoType    *string `json:"info_type,omitempty"`
	InfoContent *string `json:"info_content,omitempty"`
}

type UserConfirmAuthorizationInfo struct {
	UserDisplayName        *string `json:"user_display_name,omitempty"`
	OutAuthorizationNo     *string `json:"out_authorization_no,omitempty"`
	AuthorizationNotifyUrl *string `json:"authorization_notify_url,omitempty"`
}

type TransferBillStatus string

func (e TransferBillStatus) Ptr() *TransferBillStatus {
	return &e
}

const (
	TRANSFERBILLSTATUS_ACCEPTED          TransferBillStatus = "ACCEPTED"
	TRANSFERBILLSTATUS_PROCESSING        TransferBillStatus = "PROCESSING"
	TRANSFERBILLSTATUS_WAIT_USER_CONFIRM TransferBillStatus = "WAIT_USER_CONFIRM"
	TRANSFERBILLSTATUS_TRANSFERING       TransferBillStatus = "TRANSFERING"
	TRANSFERBILLSTATUS_SUCCESS           TransferBillStatus = "SUCCESS"
	TRANSFERBILLSTATUS_CANCELING         TransferBillStatus = "CANCELING"
)

```
